5 Commits (2a2e1904ea580d8ff5a4733b1cfb322288f3e738)

Author	SHA1	Message	Date
Alisdair McDiarmid	8df065a2fe	initwd: Switch from earlyconfig to configs ... This is a mostly mechanical refactor with a handful of changes which are necessary due to the semantic difference between earlyconfig and configs. When parsing root and descendant modules in the module installer, we now check the core version requirements inline. If the Terraform version is incompatible, we drop any other module loader diagnostics. This ensures that future language additions don't clutter the output and confuse the user. We also add two new checks during the module load process: * Don't try to load a module with a `nil` source address. This is a necessary change due to the move away from earlyconfig. * Don't try to load a module with a blank name (i.e. `module ""`). Because our module loading manifest uses the stringified module path as its map key, this causes a collision with the root module, and a later panic. This is the bug which triggered this refactor in the first place.	3 years ago
Martin Atkins	df578afd7e	backend/local: Check dependency lock consistency before any operations ... In historical versions of Terraform the responsibility to check this was inside the terraform.NewContext function, along with various other assorted concerns that made that function particularly complicated. More recently, we reduced the responsibility of the "terraform" package only to instantiating particular named plugins, assuming that its caller is responsible for selecting appropriate versions of any providers that _are_ external. However, until this commit we were just assuming that "terraform init" had correctly selected appropriate plugins and recorded them in the lock file, and so nothing was dealing with the problem of ensuring that there haven't been any changes to the lock file or config since the most recent "terraform init" which would cause us to need to re-evaluate those decisions. Part of the game here is to slightly extend the role of the dependency locks object to also carry information about a subset of provider addresses whose lock entries we're intentionally disregarding as part of the various little edge-case features we have for overridding providers: dev_overrides, "unmanaged providers", and the testing overrides in our own unit tests. This is an in-memory-only annotation, never included in the serialized plan files on disk. I had originally intended to create a new package to encapsulate all of this plugin-selection logic, including both the version constraint checking here and also the handling of the provider factory functions, but as an interim step I've just made version constraint consistency checks the responsibility of the backend/local package, which means that we'll always catch problems as part of preparing for local operations, while not imposing these additional checks on commands that _don't_ run local operations, such as "terraform apply" when in remote operations mode.	5 years ago
Martin Atkins	17b766c3ea	configs: EntersNewPackage methods for descendant modules ... Now that we (in the previous commit) refactored how we deal with module sources to do the parsing at config loading time rather than at module installation time, we can expose a method to centralize the determination for whether a particular module call (and its resulting Config object) enters a new external package. We don't use this for anything yet, but in later commits we will use this for some cross-module features that are available only for modules belonging to the same package, because we assume that modules grouped together in a package can change together and thus it's okay to permit a little more coupling of internal details in that case, which would not be appropriate between modules that are versioned separately.	5 years ago
Martin Atkins	1a8da65314	Refactoring of module source addresses and module installation ... It's been a long while since we gave close attention to the codepaths for module source address parsing and external module package installation. Due to their age, these codepaths often diverged from our modern practices such as representing address types in the addrs package, and encapsulating package installation details only in a particular location. In particular, this refactor makes source address parsing a separate step from module installation, which therefore makes the result of that parsing available to other Terraform subsystems which work with the configuration representation objects. This also presented the opportunity to better encapsulate our use of go-getter into a new package "getmodules" (echoing "getproviders"), which is intended to be the only part of Terraform that directly interacts with go-getter. This is largely just a refactor of the existing functionality into a new code organization, but there is one notable change in behavior here: the source address parsing now happens during configuration loading rather than module installation, which may cause errors about invalid addresses to be returned in different situations than before. That counts as backward compatible because we only promise to remain compatible with configurations that are _valid_, which means that they can be initialized, planned, and applied without any errors. This doesn't introduce any new error cases, and instead just makes a pre-existing error case be detected earlier. Our module registry client is still using its own special module address type from registry/regsrc for now, with a small shim from the new addrs.ModuleSourceRegistry type. Hopefully in a later commit we'll also rework the registry client to work with the new address type, but this commit is already big enough as it is.	5 years ago
Martin Atkins	31349a9c3a	Move configs/ to internal/configs/ ... This is part of a general effort to move all of Terraform's non-library package surface under internal in order to reinforce that these are for internal use within Terraform only. If you were previously importing packages under this prefix into an external codebase, you could pin to an earlier release tag as an interim solution until you've make a plan to achieve the same functionality some other way.	5 years ago